How much does a garden office cost?

25th May 2023

Garden office prices start at £21,995 all-inclusive. The starting price is based on a 2.5m x 2.5m internal measured building, which is perfect as a garden office pod for one person to work in. Prices then increase based on the increased size of the building or additional upgrades you might want.

The smallest garden offices cost £21,995 for a 2.5m x 2.5m design.

The largest garden offices cost £41,095 for a 30 square metre internal measurement building.

Between the smallest and largest sizes, we offer over 70 different size configurations to choose from. Our measurements increase in modular half metre increments so that you can find a size to fit your space and needs perfectly.

Large garden office in a sunny garden

The full list of sizes and their prices can be found clearly on our website and in our brochure.

What is included in the price of a garden office? 

What comes as standard in your all-inclusive price?

At Green Retreats, we try to ensure that there are no hidden costs involved in our buildings. This is why we include all of the ‘essentials’ in the advertised price of every building.

  • Foundations
  • Installation
  • Delivery within 100 miles of our Buckinghamshire factory
  • Maintenance-free redwood cladding
  • Maintenance-free steel and PVC coated roof
  • Premium grade breathable insulation in the walls, roof and floor
  • Premium Pilkington K Optiwhite double glazing
  • 2.3m French or sliding door
  • Opening lozenge window
  • Full height 500mm window
  • Insurance grade locking
  • Stylish Oak Laminate Flooring
  • Soft sheen UV stable melamine walls
  • Internal Electrics
  • 3 x double plug sockets
  • Internal and External lighting
  • Heating
  • Stylish graphite or black flashing surround
  • Composite deck step or 3 board decking
Make it yours with upgrade options

On top of the range of options we include in the price of every building, we also offer a vast selection of optional upgrades to tailor your building to suit your needs. 

Make it yours with options such as, bi-fold doors, air-conditioning, underfloor heating, plastering, painting and much more!

…or retrofit after we’re done!

A garden office from us is simply a space to transform into whatever room you need it to be. The best part is moving in and making it your own! 

We have seen many wonderful things that customers have done with their buildings after we’ve installed them; from complete interior designed room fit for a magazine, large scale garden bars or even bathroom and kitchen additions.

client working in a bepsoke garden office

Other potential costs involved in adding a garden office:

When considering how much does a garden office cost, it is important to know all costs that could be involved in the process.

  • Electrical connection
  • Delivery 
  • Levelling
  • Landscaping
  • Potential Planning Permission fees
Electrical connection:

Electrical connection from your home to the garden office is an unknown until your free site survey and design consultation. Once we know the distance and the demands for electricity in your building we can provide a quote. You have the option for us to complete the work for you using our very own electrical company (we never outsource our work) or you are welcome to use your own preferred electrician if you have one. 


The price of delivery is included within 100 miles of our Buckinghamshire factory (HP18 0XB). If you live outside of a 100-mile radius then please get in touch and a member of our admin team will calculate the delivery for you. 


We need your ground to be level within 200mm to install your foundations and garden office building. The only groundwork we carry out for you is the concrete mini-pile foundations. If your ground needs levelling then you should get a couple of quotes from different landscapers if you can. 

Your ground does not need to be level or cleared in preparation for your free site survey. 


We currently do not offer landscaping services. If you are having your garden landscaped as part of your garden office installation we would be happy to liaise with your chosen contractor to make sure your plans go smoothly. 

Potential Planning Permission costs (only if you need them)

Our garden office buildings generally do not require planning permission. However, there are some circumstances where it is unavoidable or necessary depending on the size and position of your garden office building. Find out more about garden offices and planning permission here…

If you do need to apply for planning permission, we take care of the application process for you – giving you one less thing to worry about. 

fully insulated garden office interior with desk and workspace

Do you offer garden offices that are larger than 30 square metres?

Any garden offices larger than 30 square metres internally would need to comply with building regulations which makes them a more expensive build project with a longer lead time. We do offer a range of building designs that comply with building regulations for those who need them. If you require a larger building or if you need a building as permanent living accommodation then check out our annex range.

Are garden offices good value for money?

When considering how much does a garden office cost, it is important to also consider it’s value for money. Garden offices are a cost-effective way to add extra space at home. Compared to traditional home extension methods, such as loft conversions or extensions, the addition of a garden office is not only cheaper but much easier too. Garden offices generally do not require planning permission, do not need building regulation sign off and are installed within 1-5 days.

small garden office at the bottom of a garden

Do garden offices add value to your home?

A quality made garden office building can add value to your home. Using only premium grade materials means that our garden office buildings are built to last. Every building comes with a comprehensive 10-year guarantee and is designed for a 30-year life. Garden buildings have soared in popularity over the years, having until recently been a product that was not well understood. Now, garden buildings such as ours are hugely popular and with that popularity is a familiarity of quality. Your garden office building’s quality, as well as the addition of extra usable space at home, is very likely to translate positively with the potential buyers.

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Building Measurements

You can get a great idea of how your new garden office will look by using the 360 degree rotating viewer.

Also compatible with mobile and tablet devices


Design Your Building

Start designing your garden room today using our online Visualiser tool. You’ll be able to choose your style, size, finishes and get an accurate cost.

Design Your Building